The 9th Infantry Battalion was formed shortly after the outbreak of war, and was recruited entirely from Queensland. After a short period of training, the Battalion departed Brisbane on 24 September 1914 on board HMAT Omrah A5. While en route, Omrah received 44 survivors of the Emden. On 12 May 1918, en route from Marseilles to Alexandria, Omrah was torpedoed and sunk by German submarine UB-52 40 nautical miles (74 km) from Sardinia.